Police say they don't know yet if the victims and suspect knew eachother.

People who frequent the park say it's not uncommon to see a group gathering near Stanyon and Oak streets.

"That spot right there has concrete, so it's like a little kind of grotto in the trees and there are often people there," said San Francisco resident Tiarie Irvine. "Often homeless people kind of just hanging out."

Investigators have not identified either victim, nor confirmed if either of the men are part of the homeless population from the area.